Improved tackle-block



rsf

UNITED STATES PATENT OFFICE.

JOSEPH W. NOROROSS, OF MIDDLETOWN, CONNECTICUT.

IMPROVED TACKLE-BLOCK.

To all whom it may concern:

Beitknown that I, Capt. JOS.W.*NORGROSS, of Middletown, in the county ofMiddlesex and State of Connecticut, have invented a new and ImprovedTackle-Block; and I do hereby declare that the following is a full,clear, and exact description th erect', which will enable others skilledin the art to make and use the same, reference being had to theaccompanying drawings, forming part of' this specification, in which-Figure 1 represents a side elevation of this invention. Fig. 2 is afront elevation ot the saine. Fig. 3 is a detached elevation of themetal strap between which the wooden checks are secured.V Fig. et is atransverse section ot' the same, the line .r m, Fig. l, indicating theplane ot' section.

Similarlettersol'ret'erenceindicatelike parts.

This invention consists in the use of a metal frame having three spaces,the middle to take the sheave and the outer ones to take the woodenchecks of a tackle-block, said frame being cast or otherwise producedot' metal in such a manner that the checks can be readily introduced inthe spaces intended for them, and by driving` a suitable wedge down inthe middle space the frame is made to clamp said cheeks tight. Saidframe is also provided with a small metal seat to receive a rope becket,so as not to wear it, which is unavoidable within ordinary eyes orrings. y

A represents a frame, cast or otherwise produced ot iron or other metal,all in one piece, without anyjoints, with an eye, a, on one and a seat,i), on the opposite end, as clearly shown in the drawings. Said frame isformed as shown more particularly in Fig. 3, being provided with threeopen spaces, c d e, which are separated from each other by thepartitionsf. The spaces c and e are intended to receive the woodenchecks B oi' the block, and the space d to receive the sheave C, whichrotates on a center pin, g,in the usual manner. The checks are placedinto the frame with the grains running in a transverse direction, or atright angles to the edges of the frame, as shown in Fig. l, and they areprovided with grooves h, (see Fig. 4,)to receive the partitionsf.Previous to introducing the checks said partitions are curved inward, asshown in Fig. 3, so that the cheeks can be readily inserted, and afterthe saine have been adjusted in the proper position a wedge is driven inbetween the partitions to force them into the grooves of the checks andto retain the latter firmlyin place. For each additional sheave anotherpair of partitions must be added to the frame.

By these means a block is produced of superior strength and durability.There are no joints or other parts about it that can give way, and thechecks with their grain cros'sWise are firmly held in the frame andprevented from splitting', and, furthermore, they do not wear as fastwith the rope moving across the grain 'as they would it` the rope wouldmove with the grain. It" one of the wooden checks should get brokemitcanbe easily replaced. The metal seat b is formed with a cavity, i, toreceive and hold a rope becket, which is much preferable to the metalbecket now used. Such metal beckets are obieetionable, because they wearthe rope; and, furthermore, by passing the rope through such a becket alarge knot is unavoidable at the tail ot' the block. By the use of arope becket all these disadvantages are avoided, and by the applicationof the seat b the use ot' a rope becketis rendered practicable. Withoutsaid seat the rope becket soon wears out, and the employment ot' thesame is not advisable.

What I claim as my invention, and desire to secure by Letters Patent, is

The metal frame Af, in combination with the inclosed wooden cheeks,substantially as and for the purposes described.

JOSEPH W. NORCROSS.

Witnesses:

W. HAUEE, WM. DEAN OVERELL.

